A battery including a swelling sensing unit. The battery includes a case and an electrode assembly in the case. The battery further includes a film on a surface of the battery. The film includes a predetermined amount of elasticity or having substantially no elasticity.

A battery including a swelling sensing unit. The battery includes a case and an electrode assembly in the case. The battery further includes a film on a surface of the battery. The film includes a predetermined amount of elasticity or having substantially no elasticity.

A pouch type secondary battery according to an embodiment of the present disclosure is a pouch type secondary battery in which a cell assembly, including an electrode assembly in which a positive electrode and a negative electrode are stacked with a separator interposed therebetween, at least one electrode tab protruding from the electrode assembly, and an electrode lead connected to the electrode tab, is housed in a pouch case, wherein the secondary battery comprises a lead film positioned between the pouch case and the electrode lead, and wherein the lead film comprises a first sealing part in a region far from the electrode assembly and a second sealing part in a region close to the electrode assembly, and a thickness of the second sealing part is larger than a thickness of the first sealing part.

A pouch type secondary battery according to an embodiment of the present disclosure is a pouch type secondary battery in which a cell assembly, including an electrode assembly in which a positive electrode and a negative electrode are stacked with a separator interposed therebetween, at least one electrode tab protruding from the electrode assembly, and an electrode lead connected to the electrode tab, is housed in a pouch case, wherein the secondary battery comprises a lead film positioned between the pouch case and the electrode lead, and wherein the lead film comprises a first sealing part in a region far from the electrode assembly and a second sealing part in a region close to the electrode assembly, and a thickness of the second sealing part is larger than a thickness of the first sealing part.

The present invention provides a rolling device for a secondary battery, the rolling device comprising: a jig member provided with a bottom plate and one or more correction frames disposed on a top surface of the bottom plate and into which the secondary battery is inserted; a pressing member provided above the jig member to press the secondary battery inserted into each of the correction frames, wherein the pressing member comprises: a support piece configured to uniformly support an entire top surface of the secondary battery inserted into the correction frame and press the entire top surface of the secondary battery inserted into the correction frame with uniform force by transmitted force; and a pressing piece configured to transmit force so that the support piece presses the entire top surface of the secondary battery inserted into the correction frame with the uniform force.

The present invention provides a rolling device for a secondary battery, the rolling device comprising: a jig member provided with a bottom plate and one or more correction frames disposed on a top surface of the bottom plate and into which the secondary battery is inserted; a pressing member provided above the jig member to press the secondary battery inserted into each of the correction frames, wherein the pressing member comprises: a support piece configured to uniformly support an entire top surface of the secondary battery inserted into the correction frame and press the entire top surface of the secondary battery inserted into the correction frame with uniform force by transmitted force; and a pressing piece configured to transmit force so that the support piece presses the entire top surface of the secondary battery inserted into the correction frame with the uniform force.

A pouch-type secondary battery includes an electrode assembly having a structure in which electrodes and separators are alternately disposed; and a pouch-type exterior configured to accommodate the electrode assembly, wherein the exterior includes an accommodation part defining a space accommodating the electrode assembly; and a sealing part disposed along a circumference of the accommodation part in which some areas of the exterior are attached to each other so that the accommodation part is sealed from an outside, wherein a plurality of corners are disposed on the sealing part, at least one corner of the plurality of corners includes a recess part recessed toward the electrode assembly; and a diagonal part disposed adjacent to the recess part and extending toward the recess part in a diagonal direction crossing a longitudinal direction of the exterior.

A pouch-type secondary battery includes an electrode assembly having a structure in which electrodes and separators are alternately disposed; and a pouch-type exterior configured to accommodate the electrode assembly, wherein the exterior includes an accommodation part defining a space accommodating the electrode assembly; and a sealing part disposed along a circumference of the accommodation part in which some areas of the exterior are attached to each other so that the accommodation part is sealed from an outside, wherein a plurality of corners are disposed on the sealing part, at least one corner of the plurality of corners includes a recess part recessed toward the electrode assembly; and a diagonal part disposed adjacent to the recess part and extending toward the recess part in a diagonal direction crossing a longitudinal direction of the exterior.

The present invention relates an apparatus for sealing a secondary battery, which seals a pouch. The apparatus for sealing the secondary battery comprises: a support block configured to support a bottom surface of one-side sealing part of the pouch; a sealing member comprising a sealing roller that moves in a longitudinal direction of the one-side sealing part in a state of pressing a top surface of the one-side sealing part supported on the support block to seal the one-side sealing part supported on the support block; and a straightening member configured to flatten a surface of the one-side sealing part on which the sealing roller passes.

The present invention relates an apparatus for sealing a secondary battery, which seals a pouch. The apparatus for sealing the secondary battery comprises: a support block configured to support a bottom surface of one-side sealing part of the pouch; a sealing member comprising a sealing roller that moves in a longitudinal direction of the one-side sealing part in a state of pressing a top surface of the one-side sealing part supported on the support block to seal the one-side sealing part supported on the support block; and a straightening member configured to flatten a surface of the one-side sealing part on which the sealing roller passes.